Which algebraic expression is equivalent to 3 less than the sum of y and 5 ?

Ineed solving this problem h/8=-25 solve for h idk how to this can someone show me and also give an answer you

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15